Respond for message sending errors

telegram/utils.go

@@ -496,10 +496,18 @@ func (c *Client) ProcessOutgoingMessage(chatID int64, text string, messageID int
 			}
 		}
 
-		c.client.SendMessage(&client.SendMessageRequest{
+		_, err := c.client.SendMessage(&client.SendMessageRequest{
 			ChatId:              chatID,
 			ReplyToMessageId:    reply,
 			InputMessageContent: message,
 		})
+		if err != nil {
+			gateway.SendMessage(
+				returnJid,
+				strconv.FormatInt(chatID, 10),
+				fmt.Sprintf("Message not sent: %s", err.Error()),
+				c.xmpp,
+			)
+		}
 	}
 }